Changes in Noncovered Other Real Estate Owned (Summary of Noncovered Other Real Estate Owned) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Real Estate Owned [Line Items]
Balance, beginning of period			$ 26,987
Proceeds from sale of OREO property			(10,779)	(15,069)
Gain (loss) on sale of OREO			8,745	8,604
Total OREO, end of period	36,273		36,273
Noncovered Loans [Member]
Other Real Estate Owned [Line Items]
Balance, beginning of period	24,339	13,925	10,676	22,893
Transfers in, net of write-downs ($48, $24, $90 and $24)	4,413	139	9,190	6,527
Transfers in, write-downs	48	24
OREO improvements	0	0	0	11
Additional OREO write-down	(1,066)	(458)	(1,636)	(4,232)
Proceeds from sale of OREO property	(4,673)	(3,170)	(10,295)	(15,069)
Gain (loss) on sale of OREO	530	439	900	745
Total OREO, end of period	$ 23,543	$ 10,875	$ 23,543	$ 10,875